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        <h1>
          <span class="m-breadcrumb"><a href="Releases.html">Release Notes</a> &raquo;</span>
          Release 3.0.0 (2021/01/01)
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          <h3>Contents</h3>
          <ul>
            <li><a href="#release-3-0-0_download">Download</a></li>
            <li><a href="#release-3-0-0_system_requirements">System Requirements</a></li>
            <li><a href="#release-3-0-0_working_items">Working Items</a></li>
            <li>
              <a href="#release-3-0-0_new_features">New Features</a>
              <ul>
                <li><a href="#release-3-0-0_taskflow_core">Taskflow Core</a></li>
                <li><a href="#release-3-0-0_cudaflow">cudaFlow</a></li>
                <li><a href="#release-3-0-0_utilities">Utilities</a></li>
                <li><a href="#release-3-0-0_profiler">Taskflow Profiler (TFProf)</a></li>
              </ul>
            </li>
            <li>
              <a href="#release-3-0-0_new_algorithms">New Algorithms</a>
              <ul>
                <li><a href="#release-3-0-0_cpu_algorithms">CPU Algorithms</a></li>
                <li><a href="#release-3-0-0_gpu_algorithms">GPU Algorithms</a></li>
              </ul>
            </li>
            <li><a href="#release-3-0-0_bug_fixes">Bug Fixes</a></li>
            <li><a href="#release-3-0-0_breaking_changes">Breaking Changes</a></li>
            <li><a href="#release-3-0-0_deprecated_items">Deprecated and Removed Items</a></li>
            <li><a href="#release-3-0-0_documentation">Documentation</a></li>
            <li><a href="#release-3-0-0_miscellaneous_items">Miscellaneous Items</a></li>
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<p>Taskflow 3.0.0 is the 1st release in the 3.x line! This release includes several new changes such as CPU-GPU tasking, algorithm collection, enhanced web-based profiler, documentation, and unit tests.</p><aside class="m-note m-info"><h4>Note</h4><p>Starting from v3, we have migrated the codebase to the <a href="https://en.wikipedia.org/wiki/C%2B%2B17">C++17</a> standard to largely improve the expressivity and efficiency of the codebase.</p></aside><section id="release-3-0-0_download"><h2><a href="#release-3-0-0_download">Download</a></h2><p>Taskflow 3.0.0 can be downloaded from <a href="https://github.com/taskflow/taskflow/releases/tag/v3.0.0">here</a>.</p></section><section id="release-3-0-0_system_requirements"><h2><a href="#release-3-0-0_system_requirements">System Requirements</a></h2><p>To use Taskflow v3.0.0, you need a compiler that supports C++17:</p><ul><li>GNU C++ Compiler at least v7.0 with -std=c++17</li><li>Clang C++ Compiler at least v6.0 with -std=c++17</li><li>Microsoft Visual Studio at least v19.27 with /std:c++17</li><li>AppleClang Xcode Version at least v12.0 with -std=c++17</li><li>Nvidia CUDA Toolkit and Compiler (nvcc) at least v11.1 with -std=c++17</li><li>Intel C++ Compiler at least v19.0.1 with -std=c++17</li></ul><p>Taskflow works on Linux, Windows, and Mac OS X.</p></section><section id="release-3-0-0_working_items"><h2><a href="#release-3-0-0_working_items">Working Items</a></h2><ul><li>enhancing the taskflow profiler (<a href="https://github.com/taskflow/tfprof">TFProf</a>)</li><li>adding methods for updating <a href="classtf_1_1cudaFlow.html" class="m-doc">tf::<wbr />cudaFlow</a> (with unit tests)</li><li>adding support for <a href="https://docs.nvidia.com/cuda/cublas/index.html">cuBLAS</a></li><li>adding support for <a href="https://developer.nvidia.com/cudnn">cuDNN</a></li><li>adding support for SYCL (ComputeCpp and DPC++)</li></ul></section><section id="release-3-0-0_new_features"><h2><a href="#release-3-0-0_new_features">New Features</a></h2><section id="release-3-0-0_taskflow_core"><h3><a href="#release-3-0-0_taskflow_core">Taskflow Core</a></h3><ul><li>replaced all non-standard libraries with C++17 STL (e.g., <a href="https://en.cppreference.com/w/cpp/utility/optional">std::<wbr />optional</a>, <a href="https://en.cppreference.com/w/cpp/utility/variant">std::<wbr />variant</a>)</li><li>added <a href="classtf_1_1WorkerView.html" class="m-doc">tf::<wbr />WorkerView</a> for users to observe the running works of tasks</li><li>added asynchronous tasking (see <a href="AsyncTasking.html" class="m-doc">Asynchronous Tasking</a>)</li><li>modified <a href="classtf_1_1ObserverInterface.html#a8225fcacb03089677a1efc4b16b734cc" class="m-doc">tf::<wbr />ObserverInterface::<wbr />on_entry</a> and <a href="classtf_1_1ObserverInterface.html#aa22f5378154653f08d9a58326bda4754" class="m-doc">tf::<wbr />ObserverInterface::<wbr />on_exit</a> to take <a href="classtf_1_1WorkerView.html" class="m-doc">tf::<wbr />WorkerView</a></li><li>added a custom graph interface to support dynamic polymorphism for tf::cudaGraph</li><li>supported separate compilations between Taskflow and CUDA (see <a href="CompileTaskflowWithCUDA.html" class="m-doc">Compile Taskflow with CUDA</a>)</li><li>added <a href="classtf_1_1Semaphore.html" class="m-doc">tf::<wbr />Semaphore</a> and tf::CriticalSection to limit the maximum concurrency</li><li>added <a href="classtf_1_1Future.html" class="m-doc">tf::<wbr />Future</a> to support cancellation of submitted tasks (see <a href="RequestCancellation.html" class="m-doc">Request Cancellation</a>)</li></ul></section><section id="release-3-0-0_cudaflow"><h3><a href="#release-3-0-0_cudaflow">cudaFlow</a></h3><ul><li>added <a href="classtf_1_1cudaFlowCapturer.html" class="m-doc">tf::<wbr />cudaFlowCapturer</a> for building a cudaFlow through stream capture (see <a href="GPUTaskingcudaFlowCapturer.html" class="m-doc">GPU Tasking (cudaFlowCapturer)</a>)</li><li>added tf::cudaFlowCapturerBase for creating custom capturers</li><li>added <a href="classtf_1_1cudaFlow.html#a89c389fff64a16e5dd8c60875d3b514d" class="m-doc">tf::<wbr />cudaFlow::<wbr />capture</a> for capturing a cudaFlow within a parent cudaFlow</li><li>added tf::Taskflow::emplace_on to place a cudaFlow on a GPU</li><li>added <a href="classtf_1_1cudaFlow.html#a7f97b68fa7c889db49b26aa71a46a7cf" class="m-doc">tf::<wbr />cudaFlow::<wbr />dump</a> and <a href="classtf_1_1cudaFlowCapturer.html#a90d1265bcc27647906bed6e6876c9aa7" class="m-doc">tf::<wbr />cudaFlowCapturer::<wbr />dump</a> to visualize cudaFlow</li><li>added tf::cudaFlow::offload and update methods to run and update a cudaFlow explicitly</li><li>supported standalone cudaFlow</li><li>supported standalone cudaFlowCapturer</li><li>added tf::cublasFlowCapturer to support <a href="https://docs.nvidia.com/cuda/cublas/index.html">cuBLAS</a> (see LinearAlgebracublasFlowCapturer)</li></ul></section><section id="release-3-0-0_utilities"><h3><a href="#release-3-0-0_utilities">Utilities</a></h3><ul><li>added utility functions to grab the cuda device properties (see <a href="cuda__device_8hpp.html" class="m-doc">cuda_<wbr />device.hpp</a>)</li><li>added utility functions to control cuda memory (see <a href="cuda__memory_8hpp.html" class="m-doc">cuda_<wbr />memory.hpp</a>)</li><li>added utility functions for common mathematics operations</li><li>added serializer and deserializer libraries to support tfprof</li><li>added per-thread pool for CUDA streams to improve performance</li></ul></section><section id="release-3-0-0_profiler"><h3><a href="#release-3-0-0_profiler">Taskflow Profiler (TFProf)</a></h3><ul><li>added visualization for asynchronous tasks</li><li>added server-based profiler to support large profiling data (see <a href="Profiler.html" class="m-doc">Profile Taskflow Programs</a>)</li></ul></section></section><section id="release-3-0-0_new_algorithms"><h2><a href="#release-3-0-0_new_algorithms">New Algorithms</a></h2><section id="release-3-0-0_cpu_algorithms"><h3><a href="#release-3-0-0_cpu_algorithms">CPU Algorithms</a></h3><ul><li>added parallel sort (see <a href="ParallelSort.html" class="m-doc">Parallel Sort</a>)</li></ul></section><section id="release-3-0-0_gpu_algorithms"><h3><a href="#release-3-0-0_gpu_algorithms">GPU Algorithms</a></h3><ul><li>added single task (see <a href="SingleTaskCUDA.html" class="m-doc">Single Task</a>)</li><li>added parallel iterations (see <a href="ForEachCUDA.html" class="m-doc">Parallel Iterations</a>)</li><li>added parallel transforms</li><li>added parallel reduction</li></ul></section></section><section id="release-3-0-0_bug_fixes"><h2><a href="#release-3-0-0_bug_fixes">Bug Fixes</a></h2><ul><li>fixed the bug in stream capturing (need to use <code>ThreadLocal</code> mode)</li><li>fixed the bug in reporting wrong worker ids when compiling a shared library due to the use of <code>thread_local</code> (now with C++17 <code>inline</code> variable)</li></ul></section><section id="release-3-0-0_breaking_changes"><h2><a href="#release-3-0-0_breaking_changes">Breaking Changes</a></h2><ul><li>changed the returned values of asynchronous tasks to be <a href="https://en.cppreference.com/w/cpp/utility/optional">std::<wbr />optional</a> in order to support cancellation (see <a href="AsyncTasking.html" class="m-doc">Asynchronous Tasking</a> and <a href="RequestCancellation.html" class="m-doc">Request Cancellation</a>)</li></ul></section><section id="release-3-0-0_deprecated_items"><h2><a href="#release-3-0-0_deprecated_items">Deprecated and Removed Items</a></h2><ul><li>removed tf::cudaFlow::device; users may call tf::Taskflow::emplace_on to associate a cudaflow with a GPU device</li><li>removed tf::cudaFlow::join, use tf::cudaFlow::offload instead</li><li>removed the legacy tf::Framework</li><li>removed external mutable use of <a href="classtf_1_1TaskView.html" class="m-doc">tf::<wbr />TaskView</a></li></ul></section><section id="release-3-0-0_documentation"><h2><a href="#release-3-0-0_documentation">Documentation</a></h2><ul><li>added <a href="CompileTaskflowWithCUDA.html" class="m-doc">Compile Taskflow with CUDA</a></li><li>added <a href="BenchmarkTaskflow.html" class="m-doc">Benchmark Taskflow</a></li><li>added <a href="LimitTheMaximumConcurrency.html" class="m-doc">Limit the Maximum Concurrency</a></li><li>added <a href="AsyncTasking.html" class="m-doc">Asynchronous Tasking</a></li><li>added <a href="GPUTaskingcudaFlowCapturer.html" class="m-doc">GPU Tasking (cudaFlowCapturer)</a></li><li>added <a href="RequestCancellation.html" class="m-doc">Request Cancellation</a></li><li>added <a href="Profiler.html" class="m-doc">Profile Taskflow Programs</a></li><li>added <a href="cudaFlowAlgorithms.html" class="m-doc">cudaFlow Algorithms</a><ul><li><a href="SingleTaskCUDA.html" class="m-doc">Single Task</a> to run a kernel function in just a single thread</li><li><a href="ForEachCUDA.html" class="m-doc">Parallel Iterations</a> to perform parallel iterations over a range of items</li><li><a href="ParallelTransformsCUDA.html" class="m-doc">Parallel Transforms</a> to perform parallel transforms over a range of items</li></ul></li><li>added <a href="Governance.html" class="m-doc">Governance</a><ul><li><a href="rules.html" class="m-doc">Rules</a></li><li><a href="team.html" class="m-doc">Team</a></li><li><a href="codeofconduct.html" class="m-doc">Code of Conduct</a></li></ul></li><li>added <a href="Contributing.html" class="m-doc">Contributing</a><ul><li><a href="guidelines.html" class="m-doc">Guidelines</a></li><li><a href="contributors.html" class="m-doc">Contributors</a></li></ul></li><li>revised <a href="ConditionalTasking.html" class="m-doc">Conditional Tasking</a></li><li>revised documentation pages for files</li></ul></section><section id="release-3-0-0_miscellaneous_items"><h2><a href="#release-3-0-0_miscellaneous_items">Miscellaneous Items</a></h2><p>We have presented Taskflow in the following C++ venues with recorded videos:</p><ul><li><a href="https://www.youtube.com/watch?v=MX15huP5DsM">2020 CppCon Taskflow Talk</a></li><li><a href="https://www.youtube.com/watch?v=u8Mc_WgGwVY">2020 MUC++ Taskflow Talk</a></li></ul><p>We have published Taskflow in the following conferences and journals:</p><ul><li>Tsung-Wei Huang, &quot;<a href="iccad20.pdf">A General-purpose Parallel and Heterogeneous Task Programming System for VLSI CAD</a>,&quot; <em>IEEE/ACM International Conference on Computer-aided Design (ICCAD)</em>, CA, 2020</li><li>Chun-Xun Lin, Tsung-Wei Huang, and Martin Wong, &quot;<a href="icpads20.pdf">An Efficient Work-Stealing Scheduler for Task Dependency Graph</a>,&quot; <em>IEEE International Conference on Parallel and Distributed Systems (ICPADS)</em>, Hong Kong, 2020</li><li>Tsung-Wei Huang, Dian-Lun Lin, Yibo Lin, and Chun-Xun Lin, &quot;Cpp-Taskflow: A General-purpose Parallel Task Programming System at Scale,&quot; <em>IEEE Transactions on Computer-aided Design of Integrated Circuits and Systems (TCAD)</em>, to appear, 2020</li></ul></section>
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